Types of Number, Prime Factors, HCF & LCM (Edexcel IGCSE Maths A: Foundation): Exam Questions

From the numbers in the box, write down the multiple of 5.

From the numbers in the box, write down the factor of 30.

From the numbers in the box, write down the square number

From the numbers in the box, write down the prime number

Write 300 as a product of its prime factors. Show your working clearly.

Find the lowest common multiple (LCM) of and
Show your working clearly.

Here is a list of numbers.

9 11 13 15 21 60

From the numbers in the list, write down the even number.

From the numbers in the list, write down the square number

From the numbers in the list, write down the multiple of 7

From the numbers in the list, write down the factor of 30

Here is a list of numbers.

9 11 25 27 33 40

From the numbers in the list, write down

(i) an even number

(ii) a cube number

Hassan says,

“the sum of two prime numbers is always even”

Give an example to show that Hassan is not correct.

and

Find the highest common factor (HCF) of and
Give your answer as a product of powers of its prime factors.